Trailer coupler



FIG. 1 is a perspective view of a trailer coupler showing my new design;

FIG. 2 is a side elevation view thereof;

FIG. 3 is a front end elevation view thereof;

FIG. 4 is a rear end elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view of a trailer coupler showing a second embodiment of my new design;

FIG. 8 is a side elevation view of FIG. 7;

FIG. 9 is a front end elevation view of FIG. 7;

FIG. 10 is a rear end elevation view of FIG. 7;

FIG. 11 is a top plan view of FIG. 7; and

FIG. 12 is a bottom plan view of FIG. 7. 

The ornamental design for trailer coupler, as shown and described. 